Valve



FIG. 1 is a side view in elevation;

FIG. 2 is a bottom, plan view;

FIG. 3 is an end view in elevation;

FIG. 4 is a top, plan view;

FIG. 5 is an side view of the side opposite to that shown in FIG. 1; and,

FIG. 6 is a end view of the end opposite to that shown in FIG. 3. 

The ornamental design for a valve, as shown and described. 